Newbie queston alert! I'm from Australia and very new to the world of cryptocurrency. I just registered on Bittrex and on the trading platform Coinigy. The intention is to trade cryptocurrency via Coinigy. Question 1 - for my very first trade, do i have to buy Bitcoin or Etherium and use it to buy other altcoins? 2. How will i get the bitcoin or etherium since you can't use fiat on Bittrex? 3. I think i can use usdt to buy cryptocurrencies but not sure where or how - and to be honest although i've read up on usdt, i feel someone needs to explain the concept to me like i was a 10 year old! 3. If for example, i buy some etherium in my first trade and make a profit, how do i buy more etherium using only the profit? The goal for now is to keep putting back some/most of my profit to trade more currencies. Thanks in advance for your help.